Ask The Experts
Q&A from the most trusted names in audiology.
Top-down v. Bottom-up Processing
October 3, 2005
What is the difference between top-down and bottom-up processing in relation to the auditory system? Read More
Hearing and Hearing Loss Central Auditory Processing Disorder (CAPD)
Horizontal Positional Nystagmus and BPPV
September 26, 2005
If horizontal nystagmus is present during positional testing, and also seen during the Dix-Hallpike, (a)what is the correct way to report it? I thought it was not BPPV unless torsional (rotational) ny... Read More
Vestibular Issues and Balance Disorders
Cleaning and Disinfecting Hearing Aids and Earmolds
September 19, 2005
Please tell me the best way to clean and disinfect hearing aids? And, what can you tell me about the transmission of disease via hearing aids? Thanks. Read More
Practice Management and Professional Issues
Advantages and Disadvantages of Insert Earphones with Pediatric Fittings
September 12, 2005
I am aware of many benefits of using insert earphones with children and with patients of all ages. My employer is concerned that threshold information obtained with inserts in small ear canals may not... Read More
Hearing Aids - Children Hearing Evaluation - Children Pediatrics Pediatrics
Response Latency for Dix-Hallpike
August 29, 2005
Is there any clinical significance as to the time of onset of the nystagmus and dizziness when doing the Hallpike for example, 10 seconds versus 40 seconds? Read More
Vestibular Issues and Balance Disorders
Causes of Retrograde Amnesia
August 22, 2005
What are all the causes of retrograde amnesia? Read More
Medical and Surgical
Norms on Bone Conduction Tone Burst ABR
August 15, 2005
Do you have any normative data on bone conduction tone burst ABR by frequency (500, 2,4k Hz) for diagnosing hearing loss in newborns? I need to build our own norms, but would like to see what others h... Read More
Electrophysiology Hearing Evaluation - Children Pediatrics
Disproportionate NIHL Among Female Workers
August 8, 2005
I review a large number of audiograms from industry. It seems there are a disproportional number of middle aged women with progressing mild-to-moderate, bilateral, flat sensorineural hearing loss. The... Read More
Hearing Conservation and NIHL
Protocols for Sale of an Established Practice
August 1, 2005
PART ONE: Are you aware of any published guidelines or protocolsregarding the closing /sale of an established diagnostic/dispensingprivate practice, specifically regarding notification of clients,main... Read More
Practice Management and Professional Issues
Spontaneous Nystagmus without Unilateral Weakness?
July 25, 2005
Is it possible to have a spontaneous nystagmus without a unilateral weakness? Read More
Vestibular Issues and Balance Disorders
Vestibular Evoked Myogenic Potentials
July 11, 2005
Question 1:What are the VEMP norms for latency and amplitude? Is there an interaural difference?Question 2:What is the appropriate CPT code for performing VEMP? Some audiologists are using the ABR cod... Read More
Electrophysiology Vestibular Issues and Balance Disorders
Adaptive Signal Unification
July 11, 2005
Please explain Adaptive Signal Unification and why it is important for Open Fitting Read More
Hearing Aids - Adults
ENG with a Flat Tympanogram?
July 4, 2005
Would you complete an ENG if the patient has a flat tympanogram? Read More
Vestibular Issues and Balance Disorders
Bone Conduction Implants and Ossicular Continuity
July 4, 2005
If a potential candidate for a bone conduction implant does have a functioning ossicular chain, could they still be a candidate? When implanted, what are the down sides to having a bone conduction uni... Read More
Bone Conduction Implants and Middle Ear Devices Hearing and Hearing Loss
False Negatives with Screening OAE
June 27, 2005
Are there false negatives with screening OAE and if so, what is the percentage and how does this occur? Read More
Otoacoustic Emissions
Causes of Caloric Perversion
June 20, 2005
I would appreciate your insight regarding when a true caloric perversion exists. I have seen several instances where a vertical component is present while performing air calorics using videonystagmogr... Read More
Vestibular Issues and Balance Disorders
Is ECochG Necessary?
June 13, 2005
I have been doing ABR testing in our clinic for about 6 years. During this time, I have only done 2 or 3 ECOGS (with help). I have never had formal training in ECOG, but have now been asked by our ENT... Read More
Electrophysiology
Use of CPT Code 92507 and TOS Codes
June 6, 2005
Part A:I have had difficulty with the code 92507, which I thought was to be used when hearing treatment/feedback/counseling was done. Is there a different code I should be using in lieu of this? Some... Read More
Practice Management and Professional Issues
Physician "Supervision" of Clinical Practice
June 6, 2005
My question is in regard to physician supervision and billing of insurance. I have seen organizations that bill services provided by audiologists and list a supervising physician on the claim. I would... Read More
Practice Management and Professional Issues
Asymmetric SP/AP Ratios
May 30, 2005
In an ECochG an SP/AP ratio less than 50% is considered normal. I had a situation in which both the left ear and the right ear ratios were less than 50% but there was a large difference in the ratios... Read More
Electrophysiology
